What is a better treatment therapy or medicine for post traumatic stress disorder?

Psychological thera: Psychological therapy & support but sertraline will help.

That depends on.....: In some severe cases, i would stabilize the patient on psychotropic medications before going near any form of therapy. In a patient who has marked hyperarousal or who is agitated - touching on triggers at all can throw them into crisis. In some of these cases, we may take weeks regulating meds before we start talking therapy. Psychoeducation & cognitive processing therapy are very important.